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1. 发明申请

US20210388538A1 COTTON-BASED ELASTICISED YARNS TO MAKE ENVIRONMENT-FRIENDLY ELASTICISED FABRICS 有权
公开(公告)号：US20210388538A1
公开(公告)日：2021-12-16
申请号：US17288464
申请日：2018-09-17
申请人： CANDIANI S.P.A.
发明人： Paolo BENELLI
IPC分类号： D02G3/32 , D02G3/28 , D02G3/36 , D02G1/02
摘要： A method is disclosed for making an elastic core yarn (50), wherein an elastic core (30) comprising a fibre (10) of natural rubber with metric count 200-1000 dtex is covered by a cotton-based covering yarn (40), comprises a step of conveying the elastic core (30) and the covering yarn (40) in such a way that the covering yarn (40) laterally attains a proximity of the elastic core (30) in a wrapping space (35); a step of helically wrapping the covering yarn (40) about the elastic core (30) in a wrapping space (35), wherein the conveying speed, and therefore the winding/unwinding speed, is selected such that the elastic core (30) is stretched up to a stretching ratio of at least 2, and such that, during this wrapping step, the covering yarn (40) becomes twisted with a final twist direction opposite to its initial twist direction, and forms a number T of coils per length unit of the elastic fibre (10) set between a predetermined minimum value T0 and a predetermined maximum value T1 both depending on the linear mass density Nm of covering yarn (40), the wrapping space (35) being enclosed by a container (67). An elasticised yarn obtained this way, and a fabric, in particular a denim type fabric, manufactured from this yarn.

2. 发明授权

US11686023B2 Method for making an elasticised yarn and fabric manufactured from said yarn 有权
公开(公告)号：US11686023B2
公开(公告)日：2023-06-27
申请号：US17288436
申请日：2019-09-12
申请人： CANDIANI S.P.A.
发明人： Alberto Primo Candiani
IPC分类号： D01D5/00 , D03D15/56
CPC分类号： D03D15/56 , D10B2201/01 , D10B2401/061
摘要： A method for making an elasticised yarn includes feeding a roving made of a cotton-based natural fibre at a weight percentage of at least 50% and having a linear mass density between 0.1 Nm and 50 Nm, to a stretching unit, and extracting it from the stretching unit at a speed higher than the unwinding speed. The stretched roving and an elastic fibre are jointly pulled through an overlapping unit, forming a spool of the elasticised yarn. The elastic fibre includes a natural rubber containing more than 80% polyisoprene 1,4-cis. The elastic fibre also includes sulphur as a vulcanization agent; a vulcanization accelerator and a vulcanization activator; an anti-tacking agent; an antioxidant agent; and a stabilisation agent. The elastic fibre is obtained by longitudinally cutting a longitudinally cut flat yarn made of the natural rubber, to attain a linear mass density between 50 dtex and 1000 dtex.

3. 发明授权

US11952682B2 Cotton-based elasticised yarns to make environment-friendly elasticised fabrics 有权
公开(公告)号：US11952682B2
公开(公告)日：2024-04-09
申请号：US17288464
申请日：2019-09-17
申请人： CANDIANI S.P.A.
发明人： Paolo Benelli
IPC分类号： D02G3/32 , D02G1/02 , D02G3/28 , D02G3/36
CPC分类号： D02G3/322 , D02G1/0293 , D02G3/286 , D02G3/288 , D02G3/36 , D10B2321/02
摘要： A method for making an elastic core yarn includes covering an elastic core having a fiber of natural rubber with metric count 200-1000 dtex with a cotton-based covering yarn. The elastic core and the covering yarn are conveyed such that the covering yarn laterally attains a proximity of the elastic core in a wrapping space. The covering yarn is helically wrapped about the elastic core. The conveying speed, and therefore the winding/unwinding speed, is selected such that the elastic core is stretched to a stretching ratio of at least two, and the covering yarn becomes twisted with a final twist direction opposite to its initial twist direction, and forms T coils per length unit of the elastic fiber set between a minimum value T0 and a maximum value T1. An elasticized yarn is thereby obtained, and a fabric, in particular a denim type fabric, is manufactured from this yarn.

4. 发明申请

US20210395930A1 METHOD FOR MAKING AN ELASTICISED YARN AND FABRIC MANUFACTURED FROM SAID YARN 有权
公开(公告)号：US20210395930A1
公开(公告)日：2021-12-23
申请号：US17288436
申请日：2019-09-12
申请人： CANDIANI S.P.A.
发明人： Alberto Primo CANDIANI
IPC分类号： D03D15/56
摘要： A method for making an elasticised yarn (9) comprises the steps of feeding a roving (1) made of a cotton-based natural fibre at a weight percentage of at least 50% and having a linear mass density set between 0.1 Nm and 50 Nm, preferably between 0.3 Nm and 25 Nm, to a stretching unit (30), and a step of extracting it from the stretching unit (30) at a speed higher than the unwinding speed; jointly pulling the stretched roving (3) and an elastic fibre (2) through an overlapping unit (40) by a ring spinning unit (50), forming a spool (59) of the elasticised yarn, wherein the elastic fibre (2) comprises a natural rubber containing more than 80% polyisoprene 1,4-cis, along with to sulphur as a vulcanisation agent at a concentration set between 0.5% and 3.0% by weight, and along with: a vulcanization accelerator and a vulcanization activator; an anti-tacking agent; an antioxidant agent; a stabilisation agent, the elastic fibre (2) obtained by longitudinally cutting a longitudinally cut flat yarn made of the natural rubber, in such a way to attain a linear mass density between 50 dtex and 1000 dtex, preferably between 100 dtex and 800 dtex, in particular between 150 dtex and 500 dtex. This way, by the above mentioned natural rubber composition, a cotton-based elasticised yarn can be obtained that is not likely to break either when being spun, or when used to make a fabric, in particular a denim fabric. An elasticised yarn obtained this way and a fabric, in particular a denim fabric, manufactured from this yarn.

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